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Preparation method of multilayer core-shell oxide/sulfide heterostructure electrode material

A technology of heterostructures and electrode materials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor conductivity and poor cycle stability, and achieve improved conductivity, stable product performance, and excellent electrochemical performance. performance effect

Inactive Publication Date: 2019-09-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of poor electrical conductivity and poor cycle stability of existing transition metal oxide electrode materials, and provides a preparation method of a multilayer core-shell oxide / sulfide heterostructure electrode material

Method used

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  • Preparation method of multilayer core-shell oxide/sulfide heterostructure electrode material
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  • Preparation method of multilayer core-shell oxide/sulfide heterostructure electrode material

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specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing a multilayer core-shell oxide / sulfide heterostructure electrode material is carried out according to the following steps:

[0023] 1. Dissolve metal salts and coordination organic compounds in a mixed solution of N,N-dimethylformamide and acetone, and stir for 4h to 8h to obtain a clear solution;

[0024] The molar ratio of the metal salt to the coordination organic compound is 1:(0.5-8); the N,N-dimethylformamide and acetone in the mixed solution of N,N-dimethylformamide and acetone The volume ratio of N,N-dimethylformamide and acetone is 1:(1~4); the volume ratio of the amount of the metal salt to the mixed solution of N,N-dimethylformamide and acetone is 1mmol:(50~300)mL;

[0025] 2. Put the clarified solution in a polytetrafluoroethylene-lined stainless steel autoclave, tighten the lid to seal, then heat the stainless steel autoclave to 120°C-200°C in a heating furnace, Under certain conditions, keep warm for...

specific Embodiment approach 2

[0038] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the metal salt described in step one is Mn(NO 3 ) 2 4H 2 O, Co(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O, MnCl 2 4H 2 O, CoCl 2 ·6H 2 O or NiCl 2 ·6H 2 O. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the coordination organic compound described in step 1 is isophthalic acid or trimesic acid. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a multilayer core-shell oxide / sulfide heterostructure electrode material, and relates to a preparation method of an electrode material. The invention aims at solving the problems of poor conductivity and poor cycling stability of the existing transition metal oxide electrode material. The preparation method comprises the following steps: 1, dissolving a metal salt and a coordination organic matter in a mixed solution of N, N-dimethylformamide and acetone; 2, preparing metal-based coordination polymer spheres; 3, preparing a multi-layer core-shell structure oxide; and 4, carrying out heating treatment in a tubular furnace. The preparation method is used for preparing the multilayer core-shell oxide / sulfide heterostructure electrode material.

Description

technical field [0001] The invention relates to a preparation method of an electrode material. Background technique [0002] The continuous growth of global energy consumption has led to a substantial increase in energy demand, while the negative impact of fossil fuels on the environment and their non-renewable nature have made renewable energy sources such as wind, solar, and geothermal energy widely concerned, and energy storage devices have become necessary. In electrochemical energy storage devices, supercapacitors can store electrical energy in a large capacity and have high-power discharge characteristics. Among various electrode materials for supercapacitors, transition metal oxides are promising due to their low cost, environmental friendliness, high specific capacitance value, and high electrochemical activity. However, due to the poor conductivity of oxides, oxide electrode materials always show low specific capacitance and poor rate performance, and poor cycle st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 亓钧雷王昭月贾赫男冯吉才
Owner HARBIN INST OF TECH